EP1850531B1 - Méthode et architecture pour interfonctionnement des réseaux standardisés - Google Patents

Méthode et architecture pour interfonctionnement des réseaux standardisés Download PDF

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Publication number
EP1850531B1
EP1850531B1 EP06290679.7A EP06290679A EP1850531B1 EP 1850531 B1 EP1850531 B1 EP 1850531B1 EP 06290679 A EP06290679 A EP 06290679A EP 1850531 B1 EP1850531 B1 EP 1850531B1
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EP
European Patent Office
Prior art keywords
standardised
network
service flow
wireless communication
communication network
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Not-in-force
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EP06290679.7A
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German (de)
English (en)
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EP1850531A1 (fr
Inventor
Lionel Fiat
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Alcatel Lucent SAS
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Alcatel Lucent SAS
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Priority to EP06290679.7A priority Critical patent/EP1850531B1/fr
Priority to PCT/EP2007/053186 priority patent/WO2007122071A1/fr
Priority to JP2009507015A priority patent/JP5235865B2/ja
Priority to KR1020087026263A priority patent/KR101409051B1/ko
Priority to US11/740,270 priority patent/US20070254663A1/en
Priority to CNB2007101047787A priority patent/CN100531099C/zh
Publication of EP1850531A1 publication Critical patent/EP1850531A1/fr
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Publication of EP1850531B1 publication Critical patent/EP1850531B1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/22—Manipulation of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/02—Inter-networking arrangements

Definitions

  • the present invention relates to a method for performing interworking of a standardised wireless communication network, particularly but not limited to a WiMAX network, and a standardised cellular network, particularly but not limited to a 3GPP or 3GPP2 core network.
  • the present invention also relates to a network element for use in interworking of a standardised wireless communication network and a standardised cellular network, such as a WiMAX network and a 3GPP/3GPP2 core networld, respectively.
  • the present invention relates to a communication system comprising a standardised wireless communication network including at least one base station for connecting of at least one user equipment and a standardised cellular network operatively connected for interworking with said standardised wireless communication network, as well as to a computer program product for use in an interworking communication system of the above-mentioned type.
  • Standardised networks i.e. standardised wireless communication networks and a standardised cellular networks, such as Wireless Microwave Access (WiMAX) networks and 3 rd Generation Partnership (3GPP) networks, respectively.
  • WiMAX Wireless Microwave Access
  • 3GPP 3 rd Generation Partnership
  • VPN Virtual Private Network
  • UE mobile user equipment
  • PGW Packet Data Gateway
  • IKEv2 Internet Key Exchange version 2
  • IPSec Internet Protocol Security
  • IPSec on the other hand, is unuseful, because WiMAX already offers a secured end-to-end solution, so that additional IPsec encryptation/integrity over WiMAX will only produce overhead communication on the WiMAX radio link. Additionally, unuseful IPSec requires additional CPU performance in both the terminal and the network, thus leading to increased cost expenditure.
  • a method for performing interworking of a standardised wireless communication network and a standardised cellular network are known from Salkintzis A K, "Interworking Techniques and Architectures for WLAN/3G Integration Toward 4G Mobile Data Networks", IEEE Wireless Communications, IEEE Service Center, Piscataway, NJ, US, vol. 11, no. 3, June 2004 (2004-06), pages 50-61, XP001217417 ISSN: 1536-1284 .
  • This article discloses methods and systems for WLAN/3G inter-working, wherein AAA (Authentication, Authorization, Accounting) signalling as defined within the 3GPP standard is used to signal a W-APN (WLAN Access Point Name; corresponding to a PDG - Packet Data Gateway or TTG - Tunnel Termination Gateway for connecting a user equipment or terminal).
  • AAA Authentication, Authorization, Accounting
  • the article teaches an approach to inter-working of standardised wireless and cellular networks which is based on standards established by the cellular network (AAA traffic), thus neglecting native wireless technology, which results in limited interworking versatility. Further, the article discloses routing enforcement with "MS-Transparent Tunnelling" mechanism, wherein normal IP routing in contrast to tunnelling is performed within the standardised wireless network.
  • the object is achieved by providing a method for performing interworking of a standardised wireless communication network and a standardised cellular network, comprising the steps of:
  • the object is also achieved a providing a network element for use in interworking of a standardised wireless communication network and a standardised cellular network, comprising means for receiving service flows from the standardised wireless communication network, for detecting a marked service flow being dedicated to be sent over the standardised cellular network among the received service flows, the service flow being marked over a radio link of the standardised wireless communication network by including signalling information for use in the standardised cellular network into a service flow management signalling of the standardised wireless communication network, and for mapping a tunnel of said marked service flow to an inter-network tunnel to an element of the standardised cellular network.
  • the object is achieved by providing a communication system of the above-mentioned type, further comprising:
  • the object is further achieved by providing a Computer program product for use in an interworking communication system including a standardised wireless communication network and a standardised cellular network, said computer program product comprising program code sequences operable to:
  • efficient interworking of different standardised networks is achieved by mapping dedicated tunnels from the standardised wireless communication network to the standardised cellular network.
  • service flows can be relayed over IEEE 802.16 WiMAX radio links to a 3GPP core network.
  • the present invention makes use of the fact that two service flows are completely distinguishable between an end terminal/user equipment and an associated base station or access point for each terminal flow, i. e. data/service flow from a given user equipment.
  • IEEE service flows correspond to tunnels over a WiMAX radio link.
  • the inventive idea therefore consists in mapping the 3GPP tunnel concept (Packet Data Protocol (PDP) concept) directly in correspondence with the above-described IEEE service flow concept and to tunnel said service flows through the WiMAX network to the 3GPP core network.
  • PDP Packet Data Protocol
  • An embodiment of the method in accordance with the present invention consists in using IEEE 802.16e Global Service Class names for this purpose.
  • the Global Service Class name associated with a given service flow would contain specific 3GPP PDP attributes, such as Access Point Name (APN) and/or Network Service Access Point Identifier (NSAPI).
  • API Access Point Name
  • NSAPI Network Service Access Point Identifier
  • the step of mapping the marked service flow is performed using an RFC 2868 tunnelling protocol.
  • the tunnelling according to RFC 2868 is described in Network Working Group publication "Radius Attributes for Tunnel Protocol Support", http: ⁇ www.ietf.org ⁇ rfc ⁇ rfc2868.txt.
  • each service flow of the standardised wireless communication network is mapped to a separate tunnel between said element of the standardised wireless communication network and said element of the standardised cellular network.
  • a plurality of dedicated service flows are mapped by extended Mobile IP (MIP) tunnelling.
  • MIP Mobile IP
  • said first and second network elements are embedded in a single network entity. This way, service flow tunnelling may be achieved internally within said network entity, thus considerably facilitating interworking communication.
  • a Home Agent additional implementations based on extended Mobile IP and/or micro-mobility concepts can also be employed.
  • the network element in the standardised cellular network may include a routing functionality of a home network of a mobile user equipment.
  • MIP extended Mobile IP
  • Fig. 1 shows a schematic block diagram of an embodiment of a communication system 1 in accordance with the present invention.
  • the communication system 1 generally comprises a standardised wireless communication network in the form of a WiMAX network 2 and a standardised cellular network in the form of a 3G core network 3, which are operatively connected for interworking. Additionally, in accordance with the embodiment shown the communication system 1 further comprises a further network in the form of an IP network/internet 4.
  • the communication system 1 comprises at least one mobile terminal 5, also referred to as mobile station (MS) or user equipment (UE). Furthermore, the WiMAX network 2 comprises a number of base stations (BS) 6, also referred to as access points. The base stations 6 are connected with an Access Server Node Gateway (ASN-GW) 7, also referred to as Wimax Access Controler (WAC), which functions as a router for transmissions from a number of base stations 6, as shown.
  • ASN-GW Access Server Node Gateway
  • WAC Wimax Access Controler
  • the WAC 7 comprises means 7a for receiving service flows from the WiMAX network 2, means 7b for detecting a marked service flow being dedicated to be sent over the 3G core network 3 among the received service flows, and means 7c for mapping a tunnel of said marked service flow to an inter-network tunnel to an element of the 3G core network 3.
  • said means 7a-c can be devised in software form. The functioning of said means 7a-c will become apparent later. However, it should already be noted here that according to the present invention means 7a-c may also be (alternatively) embedded in one of base stations 6.
  • the communication system 1 comprises at least a first network element 8, in the following referred to as Tunnel Termination Gateway (TTG), a second network element 9, in the following referred to as Gateway GPRS Support Node (GGSN). Second network element 9 is operatively connected with a Packet Data Network (PDN) 10 , i.e., an IP network. Furthermore, the communication system 1 of Fig. 1 comprises another element 11 referred to as Home Agent (HA). As further indicated in Fig.
  • TMG Tunnel Termination Gateway
  • GGSN Gateway GPRS Support Node
  • PDN Packet Data Network
  • HA Home Agent
  • TTG 8 comprises means 8a for establishing at least one inter-network tunnel of the WiMAX network 2 for mapping a WiMAX service flow marked as dedicated to be sent over the 3G core network 3, the functioning of which will become apparent later.
  • Said means 8a are preferably devised in software form.
  • DSA Dynamic Service Addition
  • said DSA request may be for addition of non-3GPP service flow 12.1 and/or for addition of 3GPP service flow 13.1 (cf. below).
  • base station 6 Upon reception of DSA request from user equipment 5, base station 6 sends out a further DSA request for service flow addition to WAC 7, as indicated by means of horizontal arrow DSA' in Fig. 1 .
  • WAC 7 then issues a Tunnel Initiation Request, preferably but not limited to a RFC 2868 Tunnel Initiation Request, to TTG 8 situated in the 3GPP network 3.
  • said Tunnel Initiation Request is indicated by means of horizontal arrow RFC 2868.
  • TTG 8 then sends a Packet Data Protocol (PDP) context activation message to GGSN 9, as indicated by means of horizontal arrow PDP in Fig. 1 .
  • PDP Packet Data Protocol
  • a number of service flow tunnels are established respectively within and between WiMAX network 2 and 3GPP network 3.
  • service flow tunnels 12.1, 13.1 for non-3GPP service flow and 3GPP service flow, respectively are established over a radio link between user equipment 5 and base station 6.
  • Base station 6 then relays said service flows to WAC 7 via service flow tunnel 12.2 for non-3GPP service flow and service flow tunnel 13.2 dedicated for the 3GPP service flow and marked accordingly.
  • said marked service flow 13.2 is received and detected among a totality of received service flows 12.2, 13.2 by receiving means 7a and detecting means 7b, respectively.
  • said marking of a service flow over the radio link as "3GPP service flow" intended for mapping to the 3GPP network 3 can be achieved in a variety of ways: Preferably, Global Service Class names as described in specification IEEE 802.16e may be used.
  • a Global Service Class name associated with a given service flow will comprise certain 3GPP PDP attributes, e. g., an Access Point Name (APN) and/or Network Service Access Point Identifier (NSAPI) are added to the Global Service Class name in order to signal in the WiMAX network 2 a terminal service flow which has to be mapped with the 3GPP core network 3.
  • APN Access Point Name
  • NSAPI Network Service Access Point Identifier
  • other approaches may be used to exchange 3GPP PDP signalling between the WiMAX user equipment 5 and the WiMAX network 2: For instance, a specific service flow may be used together with 3GPP GPRS session management (SM), like Protocol over IP.
  • SM 3GPP GPRS session management
  • the WiMAX network 2 relays received and detected service flow tunnel 13.2 together with the above-mentioned 3GPP PDP attributes to said first network element 8 (TTG) of 3GPP core network 3 using mapping means 7c.
  • service flow tunnel 13.2 to be mapped can also be referred to as "per service flow” tunnel, since every service flow is being tunnelled individually from the user equipment 5 to TTG 8.
  • TTG functionality is extended to enable additional tunnel signalling and data tunnelling with respect to standard TTG functionality.
  • this can be achieved by suitably devising said means 8a for establishing an inter-network tunnel with WAC 7 comprised in TTG 8, preferably by providing corresponding program code sequences thereto.
  • service flow tunnel 13.3 established for mapping/relaying of service flow tunnel 13.2 to TTG 8 corresponds to said inter-network tunnel established between an element (WAC 7) of WiMAX network 2 and an element (TTG 8) of 3GPP core network 3.
  • service flow tunnel 13.3 is devised as an RFC 2868 tunnel.
  • TTG 8 then relays the service flow on 3GPP PDP tunnel 13.4 to GGSN 9 and eventually to other elements within 3GPP core network 3.
  • non-3GPP service flow initiated on service flow tunnel 12.1 and further relayed to WAC 7 via service flow tunnel 12.2 is managed normally according to WiMAX fashion by further relaying to the IP network/internet 4 on MS Mobile IP (MIP) tunnel 12.3 and IP flow tunnel 12.4 via Home Agent (HA) 11, as known to a person skilled in the art.
  • MIP MS Mobile IP
  • HA Home Agent
  • a communication system 1 in accordance with the present invention by means of network element WAC 7 / base station 6 and network element TTG 8 achieves relaying service flows over IEEE 802.16/WiMAX radio links from WiMAX network 2 to 3GPP core network 3, wherein two service flows 12.1, 13.1, i. e. non-3GPP service flows and 3GPP service flows, respectively, are completely distinguishable between a mobile terminal 5 and an associated base station 6 for every terminal flow.
  • IEEE service flows correspond to tunnels over the WiMAX radio link.
  • the basic idea in accordance with the present invention consists in mapping the 3GPP tunnelling concept, i. e. PDP concept, in correspondence with said WiMAX service flow concept and to tunnel said WiMAX service flows through the WiMAX network to the 3GPP core network.
  • Fig. 2 is a schematic block diagram of a second embodiment of a communication system 1' in accordance with the present invention. Elements of the communication system 1' corresponding or similar in configuration and/or function to elements of the communication system 1 of Fig. 1 have been assigned the same reference numerals. For reasons of simplicity, non-3GPP service flows have not been included in Fig. 2 .
  • the communication system 1' of Fig. 2 comprises a user equipment 5 operatively connected with WAC 7 via base station 6.
  • Base station 6 and WAC 7 constitute WiMAX network 2.
  • 3GPP core network 3 of Fig. 2 comprises at least GGSN 9 and a further element 14 including merged Home Agent (HA) 11 and tunnel termination gateway (TTG) 8 (cf. Fig. 1 ). In this case, as shown in Fig.
  • an extended Mobile IP (MIP) solution may be employed:
  • MIP Mobile IP
  • the "per service flow" tunnel for 3GPP service flows interconnecting different standardised networks 2, 3 is devised in the form of an extended MIP tunnel 15 enabling to tunnel different flows (e.g., 3GPP service flows and non-3GPP service flows) per mobile terminal/user equipment 5 over MIP to the 3GPP network 3.
  • FIG. 3 shows a schematic block diagram of a third embodiment of a communication system 1" in accordance with the present invention. Again, in Fig. 3 the same reference numerals have been used to designate elements of similar configuration and/or functionality with respect to the description of figs. 1 and 2 .
  • the communication system 1" of Fig. 3 comprises a user equipment 5 operatively connected with a base station 6 of WiMAX network 2.
  • 3GPP core network 3 comprises at least GGSN 9.
  • Interworking of WiMAX network 2 and 3GPP core network 3 is achieved by means of a further element 16 functioning as an interface between WiMAX network 2 and 3GPP core network 3, wherein said element 16 effectively includes functionality of both WAC 7 and TTG 8, as indicated in Fig. 3 .
  • the TTG 8 has been embedded in the WAC 7, so that a "per service flow" tunnel interconnecting different standardised networks 2, 3 may be devised internally within said element 16 by any suitable means.
  • HA Home Agent
  • GTP GPRS Tunnelling Protocol
  • TTG 8 and GGSN 9 could be embedded in one common network entity, thus constituting Packet Data Gateway (PDG) of the 3GPP network.
  • PGW Packet Data Gateway
  • entity 7 WAC
  • IKEv2 /IPSec client functions as an IKEv2 /IPSec client and performs mapping with said marked service flows over a radio link in the standardised wireless communication network, i.e. the WiMAX network.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Claims (8)

  1. Procédé destiné à réaliser un interfonctionnement entre un réseau de communication sans fil normalisé (2) et un réseau cellulaire normalisé (3), caractérisé par les étapes suivantes
    - utitiser un flux de service marqué sur une liaison radio dans le réseau de communication sans fil normalisé (2) comme dédié pour être envoyé sur le réseau cellulaire normalisé (3), dans lequel l'utilisation dudit flux de service marqué est réalisée en incluant des informations de signalisation à utiliser dans le réseau cellulaire normalisé (3) dans une signalisation de gestion de flux de service du réseau de communication sans fil normalisé (2) ;
    - transporter ledit flux de service marqué dans un tunnel de flux de service (13,2) dans le réseau de communication sans fil normalisé (2) ;
    - mettre en correspondance ledit tunnel de flux de service (13.2) avec un tunnel inter-réseau (13.3, 15) à partir d'un élément (7) dudit réseau de communication sans fil normalisé (2) vers un élément (8) dudit réseau cellulaire normalisé (3).
  2. Procédé selon la revendication 1, caractérisé en ce que le réseau de communication sans fil normalisé (2) est un réseau WiMAX.
  3. Procédé selon la revendication 1, caractérisé en ce que le réseau cellulaire normalisé (3) est un coeur de réseau 3GPP ou un coeur de réseau 3GPP2.
  4. Procédé selon la revendication 1, caractérisé en ce que ladite étape de mise en correspondance du flux de service marqué (13.2) est réalisée en utilisant un protocole de tunnelisation RFC 2868.
  5. Procédé selon la revendication 1, caractérisé en ce qu'une pluralité de flux de service comprenant ledit flux de service marqué (13.2) est mise en correspondance par tunnelisation IP Mobile, MIP, étendue pour permettre la tunnelisation de différents flux à partir d'un équipement utilisateur (5) sur MIP vers le réseau cellulaire normalisé (3).
  6. Élément de réseau (6, 7) à utiliser dans un interfonctionnement entre un réseau de communication sans fil normalisé (2) et un réseau cellulaire normalisé (3), caractérisé par des moyens (7a à c) pour recevoir des flux de service (12,1, 12.2 ; 13.1, 13.2) à partir du réseau de communication sans fil normalisé (2), pour détecter un flux de service marqué (13.1, 13,2) dédié pour être envoyé sur le réseau cellulaire normalisé (3) parmi les flux de service reçus (12.1, 12.2 ; 13.1, 13.2), le flux de service étant marqué sur une liaison radio du réseau de communication sans fil normalisé (2) en incluant des informations de signalisation à utiliser dans le réseau cellulaire normalisé (3) dans une signalisation de gestion de flux de service du réseau de communication sans fil normalisé (2), et pour mettre en correspondance un tunnel dudit flux de service marqué avec un tunnel inter-réseau (13.3, 15) vers un élément (8) du réseau cellulaire normalisé.
  7. Système de communication (1, 1', 1") comprenant :
    - un réseau de communication sans fil normalisé (2) comprenant au moins une station de base (6) pour la connexion d'au moins un équipement utilisateur (5) ;
    - un réseau cellulaire normalisé (3) connecté de manière opérationnelle pour un interfonctionnement avec ledit réseau de communication sans fil normalisé (2) ;
    caractérisé par
    - un premier élément de réseau (6, 7) selon la revendication 6 dans ledit réseau de communication sans fil normalisé (2) ; et
    - un deuxième élément de réseau (8) dans ledit réseau cellulaire normalisé (3), comprenant des moyens (8a) pour établir ledit tunnel inter-réseau (13.3, 15) avec ledit élément (6, 7) du réseau de communication sans fil normalisé (2) pour mettre en correspondance un flux de service du réseau de communication sans fil normalisé (2) marqué comme dédié pour être envoyé sur le réseau cellulaire normalisé (3).
  8. Produit de programme informatique à utiliser dans un système de communication à interfonctionnement (1, 1', 1") comprenant un réseau de communication sans fil normalisé (2) et un réseau cellulaire normalisé (3), ledit produit de programme informatique étant caractérisé en ce qu'il comprend des séquences de code de programme permettant :
    - de marquer un flux de service (13.2) sur une liaison radio du réseau de communication sans fil normalisé (2) en incluant des informations de signalisation à utiliser dans le réseau cellulaire normalisé (3) dans une signalisation de gestion de flux de service du réseau de communication sans fil normalisé (2) :
    - d'utiliser ledit flux de service marqué (13.2) comme dédié pour être envoyé sur le réseau cellulaire normalisé (3) ;
    - de transporter ledit flux de service marqué (13.2) dans un tunnel de flux de service dans le réseau de communication sans fil normalisé (2) ;
    - de mettre en correspondance ledit tunnel de flux de service avec un tunnel inter-réseau (13.3, 15) à partir d'un élément (7) dudit réseau de communication sans fil normalisé (2) vers un élément (8) dudit réseau cellulaire normalisé (3),
    lorsqu'il est exécuté sur des éléments (6, 7, 8, 11, 14, 16) dudit système de communication (1, 1', 1").
EP06290679.7A 2006-04-26 2006-04-26 Méthode et architecture pour interfonctionnement des réseaux standardisés Not-in-force EP1850531B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP06290679.7A EP1850531B1 (fr) 2006-04-26 2006-04-26 Méthode et architecture pour interfonctionnement des réseaux standardisés
PCT/EP2007/053186 WO2007122071A1 (fr) 2006-04-26 2007-04-02 Procede et architecture de mise en reseau de reseaux standardises
JP2009507015A JP5235865B2 (ja) 2006-04-26 2007-04-02 標準化されたネットワークのインターワーキングのための方法およびアーキテクチャ
KR1020087026263A KR101409051B1 (ko) 2006-04-26 2007-04-02 인터워킹 수행 방법, 네트워크 요소, 통신 시스템 및 컴퓨터 프로그램 제품
US11/740,270 US20070254663A1 (en) 2006-04-26 2007-04-25 Method and architecture for interworking of standardised networks
CNB2007101047787A CN100531099C (zh) 2006-04-26 2007-04-26 用于标准化网络的互通的方法、网络单元和通信系统

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EP06290679.7A EP1850531B1 (fr) 2006-04-26 2006-04-26 Méthode et architecture pour interfonctionnement des réseaux standardisés

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EP1850531A1 EP1850531A1 (fr) 2007-10-31
EP1850531B1 true EP1850531B1 (fr) 2013-06-12

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JP (1) JP5235865B2 (fr)
KR (1) KR101409051B1 (fr)
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WO (1) WO2007122071A1 (fr)

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CN101064662A (zh) 2007-10-31
CN100531099C (zh) 2009-08-19
JP5235865B2 (ja) 2013-07-10
US20070254663A1 (en) 2007-11-01
KR101409051B1 (ko) 2014-06-18
EP1850531A1 (fr) 2007-10-31
WO2007122071A1 (fr) 2007-11-01
KR20090008284A (ko) 2009-01-21
JP2009534966A (ja) 2009-09-24

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